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Contains:  IC 1805
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Melotte 15 Heart of the Heart Nebula - HOO, 


            Jerry Macon
Melotte 15 Heart of the Heart Nebula - HOO

Melotte 15 Heart of the Heart Nebula - HOO

Technical card

Resolution: 2600x1800

Dates:Jan. 19, 2019Jan. 24, 2019

AstroDon 5nm Ha filter: 62x300" (gain: 99.00) -20C bin 1x1
AstroDon 5nm Oiii filter: 63x300" (gain: 99.00) -20C bin 1x1

Integration: 10.4 hours

Avg. Moon age: 15.66 days

Avg. Moon phase: 90.16%

Bortle Dark-Sky Scale: 4.00

Temperature: -5.00 job: 2598911

RA center: 38.354 degrees

DEC center: 61.440 degrees

Pixel scale: 0.701 arcsec/pixel

Orientation: 177.922 degrees

Field radius: 0.308 degrees

Locations: Dark Star Observatory, Taos, New Mexico, United States

Data source: Own remote observatory

Remote source: Non-commercial independent facility


Images from the following two scopes (piggybacked) contributed to this image:
AG12+ASI1600MM at .70 asec/pix
TV127is+ASI183MM at .75 asec/pix.
They were all registered to the best Ha image taken on the AG12.

Imaged on nights of 2019/1/19, 20, 23, 24.

In the beautiful constellation Cassiopeia located 7,500 light years away from Earth, is a gorgeous star cluster called Melotte 15. It lies in the center of the famous Heart Nebula and extends for 30 light years.
The Heart Nebula, IC 1805, Sharpless 2-190, is located in the Perseus Arm of the Galaxy in the constellation Cassiopeia. It was discovered by William Herschel on 3 November 1787. This is an emission nebula showing glowing ionized hydrogen gas and darker dust lanes.

The nebula's intense red output and its configuration are driven by the radiation emanating from a small group of stars near the nebula's center. This open cluster of stars known as Melotte 15 contains a few bright stars nearly 50 times the mass of our Sun, and many more dim stars that are only a fraction of our Sun's mass.

This nebula and star cluster was only formed 1.5 million years ago, which is still considered a baby in the universe time-scale. Who knows what planets and species may already be present in this part of the universe, or what the future may hold for this star cluster. For now humans can look upon this nebula and star cluster with a sense of wonder and appreciation for how incredible the universe is.



Jerry Macon
License: Attribution Creative Commons

Sky plot

Sky plot


Melotte 15 Heart of the Heart Nebula - HOO, 


            Jerry Macon